CLASSICAL MECHANICS

CLASSICAL MECHANICS

Classical mechanics describes the motion of macroscopic objects, from projectiles to parts of machinery, as well as astronomical objects, such as spacecraft, planets, stars, and galaxies. Within classical mechanics are fields of study that describe the behavior of solids, liquids and gases and other specific sub-topics. Classical mechanics also provides extremely accurate results as long as the domain of study is restricted to large objects and the speeds involved do not approach the speed of light. When the objects being examined are sufficiently small, it becomes necessary to introduce the other major sub-field of mechanics, quantum mechanics, which adjusts the laws of physics of macroscopic objects for the atomic nature of matter by including the wave–particle duality of atoms and molecules. When both quantum mechanics and classical mechanics cannot apply, such as at the quantum level with high speeds, quantum field theory (QFT) becomes applicable.The earliest development of classical mechanics is often referred to as Newtonian mechanics, and is associated with the physical concepts employed by and the mathematical methods invented by Newton, Leibniz, and others.

• NEWTON'S FIRST LAW OF MOTION:  A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.

• NEWTONS'S SECOND LAW OF MOTION: The net force acting on an object is equal to the mass of that object times its acceleration.
• NEWTON'S SECOND LAW OF MOTION: For every action, there is an equal and opposite reaction.
• NEWTONS LAW OF UNIVERSAL GRAVITATION: The pull of gravity between two objects will be proportional to the masses of the objects and inversely proportional to the square of the distance between their centers of mass.
• LAW OF CONSERVATION OF ENERGY: Energy cannot be created nor destroyed, and instead changes from one form to another; for example, mechanical energy turning into heat energy.
• LAW OF CONSERVATION OF MOMENTUM: In the absence of external forces such as friction, when objects collide, the total momentum before the collision is the same as the total momentum after the collision.
• BERNOULLI'S PRINCIPLE: Within a continuous streamline of fluid flow, a fluid's hydrostatic pressure will balance in contrast to its speed and elevation.

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PARTICLES OF GRAVITY

PARTICLES OF GRAVITY

It may be possible to draw energy from a vacuum using gravity, a theoretical physicist says.

If researchers succeed in showing that this can happen, it could prove the long-postulated existence of the graviton, the particle of gravity, and perhaps bring scientists one step closer to developing a "theory of everything" that can explain how the universe works from its smallest to largest scales.The new research specifically found that it might be possible to show that gravitons do exist by using superconducting plates to measure a phenomenon with the esoteric name of "the gravitational Casimir effect".